MC
Mary Costello — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Monmouth, New Jersey
Our Model Tree links this Mary Costello across the 1930 and 1940 US Censuses in Monmouth, New Jersey (XGBoost, ~Confirmed) — first a daughter (b.~1929), then head of a 11-person household.
Age 1
b. ~1929
Female
Daughter
Born: New Jersey
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Monmouth, New Jersey |
| Surname | Costello |
| Given Name | Mary M |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Additional Details | |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Township / Ward | Borough Of Freehold |
| Est. Birth Year | ~1929 |
Household Members
Census records only state relationship to the household head.
Pairwise kinship is derived (~90–95% accurate), not recorded.
Step/blended families and boarders can break it.
11 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Costello | Daughter | — | 1 | ~1929 |
| Bella Boyle | Daughter | — | 14 | ~1916 |
| Rita Boyle | Daughter | — | 8 | ~1922 |
| Anna Boyle | Daughter | — | 15 | ~1915 |
| Michael Boyle | Head | — | 45 | ~1885 |
| Mary Costello | Other | — | 24 | ~1906 |
| Mary Boyle | Other | — | 44 | ~1886 |
| John Boyle | Son | — | 20 | ~1910 |
| James Boyle | Son | — | 10 | ~1920 |
| Timothy Boyle | Son | — | 22 | ~1908 |
| Michael Boyle | Son | — | 19 | ~1911 |
Census Appearances
1930
Monmouth, New …
Daughter, age 1
Monmouth, New Jersey · implied b. ~1929 — 11 household members
| Surname | Costello |
| Given Name | Mary M |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1940
Monmouth-County, New …
Daughter, age 12
Monmouth-County, New Jersey · implied b. ~1928 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | COSTELLO |
| Given Name | MARJORIE M |
| Relationship to Head | DAUGHTER |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | NEW JERSEY |
| 1935 Residence (City) | Shrewsbury Borough |
| 1935 Residence (County) | Monmouth |
| Highest Grade | S 6 |
| 1935 Residence | Same place |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
Model Tree
An inferred pedigree reconstructed from census links — up to 4 generations within the 1900–1950 window. Closer generations are built from household co-residence; deeper ones are bridged by following a relative to their own childhood census. Confidence compounds and weakens with each generation.
Our Model Tree links Mary Costello across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Costello
Daughter · 1930 · age 1 · b. ~1929 · New Jersey
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Sibling
Anna Boyle
Sibling · 1930 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Bella Boyle
Sibling · 1930 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Boyle
Sibling · 1930 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Rita Boyle
Sibling · 1930 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Boyle
Sibling · 1930 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Timothy Boyle
Sibling · 1930 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Michael Boyle
Sibling · 1930 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1930 US Federal Census — Monmouth, New Jersey
Open full size
1930 US Federal Census — Monmouth, New Jersey
Page Contents
40 people indexed on this census page (ia:1930:newjerseycensus00reel1370:0836)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Martha Spelgner | 37 | Head-H | — | Germany |
| 2 | Ann M Spelgner | 14 | Daughter | — | New York |
| 3 | Hildegarde Spelgner | 13 | Daughter | — | New York |
| 4 | Scarlet Spelgner | 12 | Son | — | New York |
| 5 | Elizabeth Spelgner | 10 | Daughter | — | Maine |
| 6 | Dorthea Spelgner | 9 | Daughter | — | Massachusetts |
| 7 | Richard Spelgner | 7 | Son | — | New Jersey |
| 8 | Michael Boyle | 45 | Head | Watchman | Northern Ireland |
| 9 | Mary Boyle | 44 | Wife-H | — | Northern Ireland |
| 10 | Timothy Boyle | 22 | Son | Cutter | Pennsylvania |
| 11 | John Boyle | 20 | Son | Helper | Pennsylvania |
| 12 | Michael Jr Boyle | 19 | Son | — | Pennsylvania |
| 13 | Anna Boyle | 15 | Daughter | — | Pennsylvania |
| 14 | Bella Boyle | 14 | Daughter | — | Pennsylvania |
| 15 | James Boyle | 10 | Son | — | Pennsylvania |
| 16 | Rita Boyle | 8 | Daughter | — | New Jersey |
| 17 | Mary Costello | 24 | — | — | Pennsylvania |
| 18 | Mary M Costello THIS PERSON | 1 | Daughter | — | New Jersey |
| 19 | Peter Eshner | 25 | Head | Title Officer | New Jersey |
| 20 | Olive W Eshner | 32 | Wife-H | — | New Jersey |
| 21 | Arthur D. Jr Eshner | 3 | Son | — | New Jersey |
| 22 | Arvitt Barkalow | 36 | Head | Contractor Elec. | New Jersey |
| 23 | Margaret Barkalow | 31 | Wife-H | — | New Jersey |
| 24 | Virginia Barkalow | 11 | Daughter | — | New Jersey |
| 25 | Dorothy Barkalow | 10 | Daughter | — | New Jersey |
| 27 | James F Baller | 39 | Head | Proprietor | Georgia |
| 28 | Sarah B Baller | 33 | Wife-H | — | New Jersey |
| 29 | Virginia L Baller | 6 | Daughter | — | New Jersey |
| 30 | James F. Jr Baller | 2 | Son | — | New Jersey |
| 31 | Lida Stillwell | 58 | Head-H | Compositor | New Jersey |
| 34 | John Gager | 73 | Head-H | — | New York |
| 35 | Charles W Gager | 26 | Son | Salesman | New Jersey |
| 37 | Katherine Scully | 28 | Head-H | — | New Jersey |
| 38 | Edna Scully | 9 | Daughter | — | New Jersey |
| 39 | Helen Scully | 7 | Daughter | — | New Jersey |
| 40 | Ralph Scully | 5 | Son | — | New Jersey |
| 42 | Jeremiah Irvin | 59 | Head-H | Helper | New Jersey |
| 43 | D. Raymond Benton | 29 | Head | T.W. Salesman | England |
| 44 | Bertha C Benton | 24 | Wife-H | — | New York |
| 47 | Joseph Vendane | 35 | Head-H | Proprietor | Italy |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 United States Federal Census (NARA). Our Model Tree links this person across census decades using XGBoost-based record linkage, with per-link confidence scores. Household corroboration strengthens the signal when co-residents appear on the same census pages in multiple years.
Source: National Archives and Records Administration (NARA)